body {
  font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 0;
}

.card {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border: none;
  margin-bottom: 20px;
}

.card-header {
  background-color: #f8f9fa;
  border-bottom: 1px solid #eee;
  font-weight: 600;
}

.sidebar {
  min-height: calc(100vh - 56px);
  background-color: #343a40;
}

.sidebar-link {
  color: rgba(255, 255, 255, 0.8);
  padding: 10px 15px;
  display: block;
  text-decoration: none;
  transition: background-color 0.3s;
}

.sidebar-link:hover, .sidebar-link.active {
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
} 